Biology – Quantitative Biology – Populations and Evolution
Scientific paper
2006-01-17
Biology
Quantitative Biology
Populations and Evolution
31 pages, 4 figures. To appear in Proc. Roy. Soc. B. Minor revisions
Scientific paper
Scale-free foraging patterns are widespread among animals. These may be the outcome of an optimal searching strategy to find scarce randomly distributed resources, but a less explored alternative is that this behaviour may result from the interaction of foraging animals with a particular distribution of resources. We introduce a simple foraging model where individuals follow mental maps and choose their displacements according to a maximum efficiency criterion, in a spatially disordered environment containing many trees with a heterogeneous size distribution. We show that a particular tree size frequency distribution induces non-Gaussian movement patterns with multiple spatial scales (L\'evy walks). These results are consistent with tree size variation and Spider monkey (Ateles geoffroyi) foraging patterns. We discuss the consequences that our results may have for the patterns of seed dispersal by foraging primates.
Boyer Denis
Cocho Germinal
Larralde Hernán
Mateos Jose L.
Miramontes Octavio
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